const path = require('path');
const semver = require('semver');
const WorkerError = require('../errors/worker_error');

// Additional information for error log
const _messages = {
  common: {
    element: 'apiGroup',
    usage: '@apiGroup group',
    example: '@apiDefine MyValidGroup Some title\n@apiGroup MyValidGroup',
  },
};

/**
 * PreProcess
 *
 * @param {Object[]} parsedFiles
 * @param {String[]} filenames
 * @param {Object}   packageInfos
 * @param {String}   target       Target path in preProcess-Object (returned result), where the data should be set.
 * @returns {Object}
 */
function preProcess (parsedFiles, filenames, packageInfos, target) {
  target = target || 'defineGroup';
  const source = 'define'; // relative path to the tree (global.), from where the data should be fetched.

  const result = {};
  result[target] = {};

  parsedFiles.forEach(function (parsedFile) {
    parsedFile.forEach(function (block) {
      if (block.global[source]) {
        const name = block.global[source].name;
        const version = block.version || packageInfos.defaultVersion;

        if (!result[target][name]) { result[target][name] = {}; }

        // fetch from global
        result[target][name][version] = block.global[source];
      }
    });
  });

  // remove empty target
  if (result[target].length === 0) { delete result[target]; }

  return result;
}

/**
 * PostProcess
 *
 * @param {Object[]} parsedFiles
 * @param {String[]} filenames
 * @param {Object[]} preProcess
 * @param {Object}   packageInfos
 * @param {String}   source       Source path in preProcess-Object
 * @param {String}   target       Relative path to the tree (local.), where the data should be modified.
 * @param {String}   messages
 */
function postProcess (parsedFiles, filenames, preProcess, packageInfos, source, target, messages) {
  source = source || 'defineGroup';
  target = target || 'group';

  messages = messages || _messages;

  // set group name if empty
  parsedFiles.forEach(function (parsedFile, parsedFileIndex) {
    parsedFile.forEach(function (block) {
      // Ignore global groups, or non existing global group names (that will be generated with this func)
      // could overwrite local names on a later starting worker process from e.g. @apiUse
      if (Object.keys(block.global).length === 0) {
        let group = block.local[target];
        if (!group) {
          // TODO: Add a warning

          // if no group is set, the filename will be the group-name
          // group = path.resolve(filenames[parsedFileIndex]);
          group = "Other";

          block.local[`${target}`] = group;
        }

        // replace special chars
        group.replace(/[^\u0041-\u005A\u0061-\u007A\u00AA\u00B5\u00BA\u00C0-\u00D6\u00D8-\u00F6\u00F8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u0527\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07CA-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u08A0\u08A2-\u08AC\u0904-\u0939\u093D\u0950\u0958-\u0961\u0971-\u0977\u0979-\u097F\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09F0\u09F1\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B71\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C33\u0C35-\u0C39\u0C3D\u0C58\u0C59\u0C60\u0C61\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDE\u0CE0\u0CE1\u0CF1\u0CF2\u0D05-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D60\u0D61\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E81\u0E82\u0E84\u0E87\u0E88\u0E8A\u0E8D\u0E94-\u0E97\u0E99-\u0E9F\u0EA1-\u0EA3\u0EA5\u0EA7\u0EAA\u0EAB\u0EAD-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1380-\u138F\u13A0-\u13F4\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u1700-\u170C\u170E-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u1820-\u1877\u1880-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191C\u1950-\u196D\u1970-\u1974\u1980-\u19AB\u19C1-\u19C7\u1A00-\u1A16\u1A20-\u1A54\u1AA7\u1B05-\u1B33\u1B45-\u1B4B\u1B83-\u1BA0\u1BAE\u1BAF\u1BBA-\u1BE5\u1C00-\u1C23\u1C4D-\u1C4F\u1C5A-\u1C7D\u1CE9-\u1CEC\u1CEE-\u1CF1\u1CF5\u1CF6\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2071\u207F\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2183\u2184\u2C00-\u2C2E\u2C30-\u2C5E\u2C60-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005\u3006\u3031-\u3035\u303B\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312D\u3131-\u318E\u31A0-\u31BA\u31F0-\u31FF\u3400-\u4DB5\u4E00-\u9FCC\uA000-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA61F\uA62A\uA62B\uA640-\uA66E\uA67F-\uA697\uA6A0-\uA6E5\uA717-\uA71F\uA722-\uA788\uA78B-\uA78E\uA790-\uA793\uA7A0-\uA7AA\uA7F8-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA840-\uA873\uA882-\uA8B3\uA8F2-\uA8F7\uA8FB\uA90A-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA60-\uAA76\uAA7A\uAA80-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uABC0-\uABE2\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]/g, '_');

        // set title before cleaning group name
        block.local[`${target}Title`] = group;

        // replace invalid chars for id attribute
        const urlSafeUTF8 = /[^-_.~\p{L}\p{N}\p{M}\p{P}\p{S}\p{Z}\p{C}]+/gu;
        // also remove parenthesis as they mess with scrollspy.js
        group = group.replace(urlSafeUTF8, '').replace(/(\(|\))/g, '');

        block.local[`${target}Name`] = group;
      }
    });
  });

  // add group description and title
  parsedFiles.forEach(function (parsedFile, parsedFileIndex) {
    parsedFile.forEach(function (block) {
      if (!block.local[target]) { return; }

      const name = block.local[target];
      const version = block.version || packageInfos.defaultVersion;
      let matchedData = {};

      if (!preProcess[source] || !preProcess[source][name]) {
        // TODO: Enable in the next version
        // At the moment the (groupname) is optional and must not be defined.
        /*
                var extra = [
                    { 'Groupname': name }
                ];
                throw new WorkerError('Referenced groupname does not exist / it is not defined with @apiDefine.',
                                      filenames[parsedFileIndex],
                                      block.index,
                                      messages.common.element,
                                      messages.common.usage,
                                      messages.common.example,
                                      extra);
*/
        // TODO: Remove in the next version
        matchedData.title = block.local[target + 'Title'];
        matchedData.description = undefined;
      } else {
      // TODO: Remove in the next version
        if (preProcess[source][name][version]) {
          // found the version
          matchedData = preProcess[source][name][version];
        } else {
          // find nearest matching version
          let foundIndex = -1;
          let lastVersion = packageInfos.defaultVersion;

          const versionKeys = Object.keys(preProcess[source][name]);
          versionKeys.forEach(function (currentVersion, versionIndex) {
            if (semver.gte(version, currentVersion) && semver.gte(currentVersion, lastVersion)) {
              lastVersion = currentVersion;
              foundIndex = versionIndex;
            }
          });

          if (foundIndex === -1) {
            const extra = [
              { Groupname: name },
              { Version: version },
              { 'Defined versions': versionKeys },
            ];
            throw new WorkerError('Referenced definition has no matching or a higher version. ' +
                                          'Check version number in referenced define block.',
            filenames[parsedFileIndex],
            block.index,
            messages.common.element,
            messages.common.usage,
            messages.common.example,
            extra);
          }

          const versionName = versionKeys[foundIndex];
          matchedData = preProcess[source][name][versionName];
        }

        // TODO: Remove in the next version
      }

      block.local.groupTitle = matchedData.title;

      if (matchedData.description) { block.local.groupDescription = matchedData.description; } // keep original block.local
    });
  });
}

/**
 * Exports
 */
module.exports = {
  preProcess: preProcess,
  postProcess: postProcess,
};
